1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 /* Acoustic Echo Cancellation implementation */
18 #include "sles_allinclusive.h"
19
20 #include <media/EffectsFactoryApi.h>
21
22 #include <audio_effects/effect_aec.h>
23
24 /**
25 * returns true if this interface is not associated with an initialized AEC effect
26 */
NO_ECHOCANCEL(IAndroidAcousticEchoCancellation * v)27 static inline bool NO_ECHOCANCEL(IAndroidAcousticEchoCancellation* v) {
28 return (v->mAECEffect == 0);
29 }
30
IAndroidAcousticEchoCancellation_SetEnabled(SLAndroidAcousticEchoCancellationItf self,SLboolean enabled)31 static SLresult IAndroidAcousticEchoCancellation_SetEnabled(
32 SLAndroidAcousticEchoCancellationItf self,
33 SLboolean enabled)
34 {
35 SL_ENTER_INTERFACE
36
37 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
38 interface_lock_exclusive(thiz);
39 thiz->mEnabled = (SLboolean) enabled;
40 if (NO_ECHOCANCEL(thiz)) {
41 result = SL_RESULT_CONTROL_LOST;
42 } else {
43 android::status_t status = thiz->mAECEffect->setEnabled((bool) thiz->mEnabled);
44 result = android_fx_statusToResult(status);
45 }
46 interface_unlock_exclusive(thiz);
47
48 SL_LEAVE_INTERFACE
49 }
50
IAndroidAcousticEchoCancellation_IsEnabled(SLAndroidAcousticEchoCancellationItf self,SLboolean * pEnabled)51 static SLresult IAndroidAcousticEchoCancellation_IsEnabled(
52 SLAndroidAcousticEchoCancellationItf self,
53 SLboolean *pEnabled)
54 {
55 SL_ENTER_INTERFACE
56
57 if (NULL == pEnabled) {
58 result = SL_RESULT_PARAMETER_INVALID;
59 } else {
60 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
61 interface_lock_exclusive(thiz);
62 SLboolean enabled = thiz->mEnabled;
63 if (NO_ECHOCANCEL(thiz)) {
64 result = SL_RESULT_CONTROL_LOST;
65 } else {
66 *pEnabled = (SLboolean) thiz->mAECEffect->getEnabled();
67 result = SL_RESULT_SUCCESS;
68 }
69 interface_unlock_exclusive(thiz);
70 }
71
72 SL_LEAVE_INTERFACE
73 }
74
IAndroidAcousticEchoCancellation_IsAvailable(SLAndroidAcousticEchoCancellationItf self,SLboolean * pEnabled)75 SLresult IAndroidAcousticEchoCancellation_IsAvailable(SLAndroidAcousticEchoCancellationItf self,
76 SLboolean *pEnabled)
77 {
78 SL_ENTER_INTERFACE
79
80 *pEnabled = false;
81
82 uint32_t numEffects = 0;
83 int ret = EffectQueryNumberEffects(&numEffects);
84 if (ret != 0) {
85 ALOGE("IAndroidAcousticEchoCancellation_IsAvailable() error %d querying number of effects",
86 ret);
87 result = SL_RESULT_FEATURE_UNSUPPORTED;
88 } else {
89 ALOGV("EffectQueryNumberEffects() numEffects=%d", numEffects);
90
91 effect_descriptor_t fxDesc;
92 for (uint32_t i = 0 ; i < numEffects ; i++) {
93 if (EffectQueryEffect(i, &fxDesc) == 0) {
94 ALOGV("effect %d is called %s", i, fxDesc.name);
95 if (memcmp(&fxDesc.type, SL_IID_ANDROIDACOUSTICECHOCANCELLATION,
96 sizeof(effect_uuid_t)) == 0) {
97 ALOGI("found effect \"%s\" from %s", fxDesc.name, fxDesc.implementor);
98 *pEnabled = true;
99 break;
100 }
101 }
102 }
103 result = SL_RESULT_SUCCESS;
104 }
105 SL_LEAVE_INTERFACE
106 }
107
108 static const struct SLAndroidAcousticEchoCancellationItf_ IAndroidAcousticEchoCancellation_Itf = {
109 IAndroidAcousticEchoCancellation_SetEnabled,
110 IAndroidAcousticEchoCancellation_IsEnabled,
111 IAndroidAcousticEchoCancellation_IsAvailable
112 };
113
IAndroidAcousticEchoCancellation_init(void * self)114 void IAndroidAcousticEchoCancellation_init(void *self)
115 {
116 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
117 thiz->mItf = &IAndroidAcousticEchoCancellation_Itf;
118 thiz->mEnabled = SL_BOOLEAN_FALSE;
119 memset(&thiz->mAECDescriptor, 0, sizeof(effect_descriptor_t));
120 // placement new (explicit constructor)
121 (void) new (&thiz->mAECEffect) android::sp<android::AudioEffect>();
122 }
123
IAndroidAcousticEchoCancellation_deinit(void * self)124 void IAndroidAcousticEchoCancellation_deinit(void *self)
125 {
126 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
127 // explicit destructor
128 thiz->mAECEffect.~sp();
129 }
130
IAndroidAcousticEchoCancellation_Expose(void * self)131 bool IAndroidAcousticEchoCancellation_Expose(void *self)
132 {
133 IAndroidAcousticEchoCancellation *thiz = (IAndroidAcousticEchoCancellation *) self;
134 if (!android_fx_initEffectDescriptor(SL_IID_ANDROIDACOUSTICECHOCANCELLATION,
135 &thiz->mAECDescriptor)) {
136 SL_LOGE("Acoustic Echo Cancellation initialization failed.");
137 return false;
138 }
139 return true;
140 }
141